常見例句雙語例句The UN250 butt-welding machine adopts manual flash prewarming, hydraulic pressure upset mode, is suitable to weld large diameter and section weldment.UN250對焊機采用手動閃光預熱、液壓頂鍛的方式,適合焊接大直徑大截面的焊件。chazidian.com 返回 flash butt weld